TY  - JOUR
AU  - V. A. Yakubovich
TI  - Minimization of quadratic functionals under quadratic constraints and the necessity of a frequency condition in the quadratic criterion for absolute stability of nonlinear control systems
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 1039
EP  - 1042
VL  - 209
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_209_5_a9/
LA  - ru
ID  - DAN_1973_209_5_a9
ER  -